You might have heard about OST to PST. When, why and how to perform conversion process that remains a logical question.
There are two types of file formats i.e. OST & PST keeping every detail of your MS Outlook. They store every Outlook data including emails, attachments, appointments, drafts, tasks, notes, contacts, calendars, etc. within them. Here PST file needs to be taken care timely as it works as the data pointer in Outlook and on the other hand, OST file doesn’t require any maintenance. It also allows you to work offline in absence of Exchange server.
Read more:- https://medium.com/@bobmaria57/when-why-and-how-to-convert-ost-to-pst-f2bf7e1f1a68